Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b2e8de9c0327f3…

MALICIOUS

PDF

43.0 KB Created: 2020-07-31 06:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a0b639e52299275e91f8f6787b220594 SHA-1: b2b628a2d3361d515583ceaa3970a220eafdfb2a SHA-256: f0b2e8de9c0327f320a8c0080d40ec48ac842949dd81dfcb98cff3b9e34fbcaa
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a malicious redirector URL, disguised as a free download for a medical textbook. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates the primary URL leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, likely for SEO manipulation or to host further malicious content. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=brunner+and+suddarth+s+textbook+of+medical+surgical+nursing+pdf+free+download In PDF document text
    • http://files.maindeleternel.org/uploads/1/3/1/6/131636655/wifeson.pdfIn PDF document text
    • http://files.berrylakewi.com/uploads/1/3/0/9/130969742/49bd3e6199cd65d.pdfIn PDF document text
    • http://files.kyliejordanartistry.com/uploads/1/3/1/4/131437484/podewavemove_rivewuvom_viwifasad_xaresozedilav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/18187858715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8400/2981/files/54537393614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/81552027365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1991/0811/files/30994830018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/93336958660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0710/7495/files/jifelusilineme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gizuvesadumewagetikuxumut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/tafetovudabijutemeturobad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9050/9973/files/dupadezofejunevuwakisudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7151/0430/files/pufejozimujumikojuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/14451381612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0940/1251/files/12437557981.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000683f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683F 5864 bytes
SHA-256: 414fee4189df3a1764e4e9875bedbaa59e30ead37f0122931934b790f5882859
font_01_sfnt_off00007c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C16 10032 bytes
SHA-256: f2022caeebb4a96dad1d902a4b8054a7f6fe6c68c77c80d4f051b8b1ae68e264

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